Brake Light switch or Bracket???

Aftermarket adjustable, two terminals on the rear end, Plastic housing no connection to ground ( single pole single throw)
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OEM style,bracket adjustable, two terminals, one on the end
, one on the side. Plastic housing no connection to ground (Single pole, single throw)
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Some sort of adjustable, with 4 terminals have no idea how it's internal contacts are wired. Plastic housing no connection to ground (could be double pole, single throw)

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